Martin Langhoff <>:
> On Thu, Dec 12, 2013 at 3:58 PM, Eric S. Raymond <> wrote:
> >>  - regardless of commit ids, do you synthesize an artificial commit?
> >> How do you define parenthood for that artificial commit?
> >
> > Because tagging is never used to deduce changesets, the case does not arise.
> So if a branch has a nonsensical branching point, or a tag is
> nonsensical, is it ignored and not imported?

I don't know what happens when identically-named tags point at changes that
resolve into two different commits.  I will figure that out and document it.

There's evidence, in the form of some code that is #ifdefed out, that 
Keith considered trying to make synthetic commits from tag cliques. But
abandoned the idea because he couldn't figure out how to assign such
cliques to a branch.

I'm not sure what counts as a nonsensical branching point. I do know that
Keith left this rather cryptic note in a REAME:

        Disjoint branch resolution. Branches occurring in a subset of the
        files are not correctly resolved; instead, an entirely disjoint
        history will be created containing the branch revisions and all
        parents back to the root. I'm not sure how to fix this; it seems
        to implicitly assume there will be only a single place to attach as
        branch parent, which may not be the case. In any case, the right
        revision will have a superset of the revisions present in the
        original branch parent; perhaps that will suffice.

                <a href="";>Eric S. Raymond</a>
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